sys-process/procps-3.3.15-r1 has medium severity CVE
https://nvd.nist.gov/vuln/detail/CVE-2018-1121

procps-ng, procps is vulnerable to a process hiding through race condition. Since the kernel's proc_pid_readdir() returns PID entries in ascending numeric order, a process occupying a high PID can use inotify events to determine when the process list is being scanned, and fork/exec to obtain a lower PID, thus avoiding enumeration. An unprivileged attacker can hide a process from procps-ng's utilities by exploiting a race condition in reading /proc/PID entries. This vulnerability affects procps and procps-ng up to version 3.3.15, newer versions might be affected also.

found using https://github.com/mrl5/vulner

example packages depending on procps:

$ equery d procps

app-emulation/docker-20.10.8 (sys-process/procps)